MIAMI (AP)  Six people died in the collapse of a pedestrian bridge onto a bustling Miami highway, and mere seconds separated those who were killed from those who survived.

The drivers on the busy highway under the bridge were out on the most ordinary of errands. A teenager was driving her friend to the doctor”s office to pick up some medicine. A father of three was heading home from work. A woman on her way to a nail salon was stopped at a red light.

The bridge plummeted onto the highway below, killing some and narrowly missing others. As investigators try to puzzle together what caused the bridge to crumble, survivors and the families of the dead are left grappling with the sudden and explicable loss.